/* 公共样式 */
.flex {
    display: flex;
}
.flex-col{
    display: flex;
    flex-direction: column;
}
.justify-between{
    display: flex;
    justify-content: space-between;
}
.justify-around{
    display: flex;
    justify-content: space-around;
    
}
.justify-start{
    display: flex;
    justify-content: start;
}
.align-center{
    display: flex;
    align-items: center;
}
.align-end{
    display: flex;
    align-items: flex-end;
}
.align-start{
    display: flex;
    align-items: flex-start;
}